<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: NotEmpty.php 18186 2009-09-17 18:57:00Z matthew $
 */

/**
 * @see Zend_Validate_Abstract
 */
require_once 'Zend/Validate/Abstract.php';

/**
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_NotEmpty extends Zend_Validate_Abstract
{
	const INVALID  = 'notEmptyInvalid';
	const IS_EMPTY = 'isEmpty';

	/**
	 * @var array
	 */
	protected $_messageTemplates = array(
	self::IS_EMPTY => "Value is required and can't be empty",
	self::INVALID  => "Invalid type given, value should be float, string, array, boolean or integer",
	);

	/**
	 * Defined by Zend_Validate_Interface
	 *
	 * Returns true if and only if $value is not an empty value.
	 *
	 * @param  string $value
	 * @return boolean
	 */
	public function isValid($value)
	{
		if (!is_null($value) && !is_string($value) && !is_int($value) && !is_float($value) &&
		!is_bool($value) && !is_array($value)) {
			$this->_error(self::INVALID);
			return false;
		}

		$this->_setValue($value);
		if (is_string($value)
		&& (('' === $value)
		|| preg_match('/^\s+$/s', $value))
		) {
			$this->_error(self::IS_EMPTY);
			return false;
		} elseif (is_int($value) && (0 === $value)) {
			return true;
		} elseif (!is_string($value) && empty($value)) {
			$this->_error(self::IS_EMPTY);
			return false;
		}

		return true;
	}

}
